| Paper | Title | Other Keywords | Page |
|---|---|---|---|
| TUPTPF044 | Beam Quality Measurements at the Synchrotron and HEBT of the Heidelberg Ion Therapy Center | synchrotron, ion, diagnostics, beam-losses | 210 |
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The Heidelberg Ion Therapy Center (HIT) for tumor treatment is presently being commissioned using the beam diagnostic devices designed and produced by the GSI beam diagnostic department. To fulfil the requirements for hadron therapy a high-resolution analysis of the particle distribution within the slowly extracted beam is necessary. We present spill-structure measurements for carbon ion beams at energies from 88 MeV up to 430 MeV, also with respect to the spill-pause and abort functionality of the rf-knock-out extraction method. The spill-structure, as measured by internal intercepting ionization chambers (IC) is compared to data recorded with external beam loss monitors (BLM). The high-resolution data acquisition system with sampling rates up to 10 kSa/s and the connected detectors are described and the achievements during the commissioning phase are discussed. |
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| TUPTPF050 | Low Energy Ion Beam Diagnostics at the VENUS ECR Ion Source | ion, simulation, plasma, dipole | 227 |
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The superconducting, electron cyclotron resonance (ECR) ion source VENUS has been designed for the dual roles of ion injector for the 88-Inch Cyclotron at LBNL and prototype high current, medium charge state injector for the driver linac of a proposed U.S. radioactive ion beam facility. Ion beam extraction and transport from an ECR is complicated as the plasma-confining solenoidal and sextupolar fields produce beams lacking axial symmetry, these beams are composed of multiple charge states with varied distributions at extraction, and the beams undergo species-dependent rotation while leaving the confining magnetic fields. We are developing an accurate, adaptable simulation model to aid in both understanding the current VENUS system and optimizing the source and transport system for the future facility. VENUS has been outfitted with various beam diagnostics such as viewing screens, a multi-wire harp, emittance scanners, and energy analyzers, and these play an essential role in correlating simulation with experiment. We will describe in detail the diagnostics employed in the VENUS beam line. Measurements with these devices will be presented and compared with ion beam simulations. |